Announcements
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EXAM 2 tomorrow! No new homework… CQ11: ΔV 12 increases 31.24: (600/11) Ω 31.59: see solutions 31.60: see solutions Office hours… MW 10-11 am TR 9-10 am F 12-1 pm Tutorial Learning Center (TLC) hours: MTWR 8-6 pm F 8-11 am, 2-5 pm Su 1-5 pm Announcements
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Announcements. EXAM II TOMORROW!! NO New Homework 31.44: P 5 Ω = 20 W, P 20 Ω = 45 W 31.45: r = 0.50 Ω , ε = 9.0 V 31.46 : 60 V Office hours… MW 12:30-1:30 pm TR 9-10 am F 10-11 am Tutorial Learning Center (TLC) hours: M 8-1 pm, 3-6 pm,W 8-1 pm, 2-6 pm - PowerPoint PPT Presentation
Transcript of Announcements
EXAM 2 tomorrow! No new homework…
CQ11: ΔV12 increases31.24: (600/11) Ω31.59: see solutions31.60: see solutions
Office hours…MW 10-11 amTR 9-10 amF 12-1 pm
Tutorial Learning Center (TLC) hours:MTWR 8-6 pm F 8-11 am, 2-5 pm Su 1-5 pm
Announcements
Outline…CH 29 – Potential & Field Connecting Potential and Field Sources of Electric Potential Finding the E-field from the
Potential A Conductor in Electrostatic
Equilibrium Capacitance and Capacitors The Energy Stored in a Capacitor
CH 30 – Current and Resistance The Electron Current Creating a Current Current and Current Density Conductivity and Resistivity Resistance and Ohm’s Law
CH 31 – Fundamentals of Circuits
Circuit Elements and Diagrams Kirchhoff’s Laws and the Basic
Circuit Energy and Power Series Resistors Real Batteries Parallel Resistors Resistor Circuits
Q1The numbers below indicate the electric potential (in Volts) at
different places in a region of space. From this information, we can conclude
100 100 100 100 100
90 90 90 90 90
70 70 70 70 70
20 20 20 20 20
1. The E-field points to the right and is constant.2. The E-field points down and is constant.3. The E-field points up and is increasing downward.4. The E-field points down and is decreasing downward.5. The E-field points down and is increasing downward.
Q2If the charge on a parallel-plate capacitor is doubled:
1. The capacitance is halved.2. The capacitance is doubled.3. The E-field is halved.4. The E-field is doubled.5. The surface charge density does not change on either plate.
Q3Conduction electrons move to the right in a certain wire. This
indicates that:
1. The current and the E-field both point right.2. The current and the E-field both point left.3. The current points right and the E-field points left.4. The current points left and the E-field points right.5. The current points left, but the E-field is unknown.
Q4Of the following, the copper conductor that has the least
resistance is
1. thin, long, hot2. thick, short, hot3. thick, long, hot4. thick, short, cool5. thin, long, cool
